build-scripts: Include SDL- prefix in SDL_REVISION when built from tarball

https://github.com/libsdl-org/SDL/issues/14575

Signed-off-by: Simon McVittie <smcv@collabora.com>
(cherry picked from commit cc681ffeda4f2e7a4663a1674483f2a5ab10f0ac)

build-scripts/pkg-support/source/SDL_revision.h.cmake.in

@@ -33,9 +33,9 @@
 #cmakedefine SDL_VENDOR_INFO "@SDL_VENDOR_INFO@"
 
 #if defined(SDL_VENDOR_INFO)
-#define SDL_REVISION "@<@PROJECT_REVISION@>@ (" SDL_VENDOR_INFO ")"
+#define SDL_REVISION "SDL-@<@PROJECT_REVISION@>@ (" SDL_VENDOR_INFO ")"
 #else
-#define SDL_REVISION "@<@PROJECT_REVISION@>@"
+#define SDL_REVISION "SDL-@<@PROJECT_REVISION@>@"
 #endif
 
 #endif /* SDL_revision_h_ */

build-scripts/pkg-support/source/SDL_revision.h.in

@@ -48,9 +48,9 @@
  */
 #define SDL_REVISION "Some arbitrary string decided at SDL build time"
 #elif defined(SDL_VENDOR_INFO)
-#define SDL_REVISION "@<@PROJECT_REVISION@>@ (" SDL_VENDOR_INFO ")"
+#define SDL_REVISION "SDL-@<@PROJECT_REVISION@>@ (" SDL_VENDOR_INFO ")"
 #else
-#define SDL_REVISION "@<@PROJECT_REVISION@>@"
+#define SDL_REVISION "SDL-@<@PROJECT_REVISION@>@"
 #endif
 
 #endif /* SDL_revision_h_ */